vSphere ESXi 9.1 support - where is Synergy?

Most other classes of HPE compute hardware (some Apollo, Cray, DL, Edgeline, Superdome Flex, ML/Microserver) are explicitly listing support for vSphere/VCF 9.1 inthe HPE Servers Support & OS Certification Matrices for VMware ESXi, however Synergy (all Generations) only shows support through ESXi 9.0. This is mirrored in the Synergy OS Support Tool page as well. What would be the reason for the current omission of certification of any Synergy generation?